US11351496B2 - Airborne particulate suppression system - Google Patents
Airborne particulate suppression system Download PDFInfo
- Publication number
- US11351496B2 US11351496B2 US17/247,971 US202117247971A US11351496B2 US 11351496 B2 US11351496 B2 US 11351496B2 US 202117247971 A US202117247971 A US 202117247971A US 11351496 B2 US11351496 B2 US 11351496B2
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- US
- United States
- Prior art keywords
- airborne particulate
- scrubbing agent
- suppression system
- coil
- air
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
- F01N3/021—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters
- F01N3/023—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters using means for regenerating the filters, e.g. by burning trapped particles
- F01N3/0237—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters using means for regenerating the filters, e.g. by burning trapped particles for regenerating ex situ
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D41/00—Regeneration of the filtering material or filter elements outside the filter for liquid or gaseous fluids
- B01D41/04—Regeneration of the filtering material or filter elements outside the filter for liquid or gaseous fluids of rigid self-supporting filtering material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/66—Regeneration of the filtering material or filter elements inside the filter
- B01D46/68—Regeneration of the filtering material or filter elements inside the filter by means acting on the cake side involving movement with regard to the filter elements
- B01D46/681—Regeneration of the filtering material or filter elements inside the filter by means acting on the cake side involving movement with regard to the filter elements by scrapers, brushes or the like
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D47/00—Separating dispersed particles from gases, air or vapours by liquid as separating agent
- B01D47/06—Spray cleaning
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
- B01F23/20—Mixing gases with liquids
- B01F23/21—Mixing gases with liquids by introducing liquids into gaseous media
- B01F23/213—Mixing gases with liquids by introducing liquids into gaseous media by spraying or atomising of the liquids
- B01F23/2132—Mixing gases with liquids by introducing liquids into gaseous media by spraying or atomising of the liquids using nozzles
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
- F01N3/021—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
- F01N3/021—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters
- F01N3/033—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters in combination with other devices
- F01N3/035—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters in combination with other devices with catalytic reactors, e.g. catalysed diesel particulate filters
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
- F01N3/04—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust using liquids
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2279/00—Filters adapted for separating dispersed particles from gases or vapours specially modified for specific uses
- B01D2279/30—Filters adapted for separating dispersed particles from gases or vapours specially modified for specific uses for treatment of exhaust gases from IC Engines
Definitions
- Diesel particulate filter (DPF) devices are implemented in diesel engines to remove soot from the exhaust. While some filters are single-use (e.g., disposable), more commonly, these filters are designed to regenerate during operation, either via a catalyst or fuel burner which heats the filter to combust the soot collected in the filters. Cleaning DPF devices is also required as part of periodic maintenance. DPF devices may also need to be cleaned outside of regular maintenance when contaminated (e.g., with fuel and/or oil). However, many cleaning techniques release soot from the DPF devices into the air, raising health concerns of those cleaning the filters and reducing the intended environmental benefit of reusing a DPF device.
- DPF Diesel particulate filter
- FIG. 1 is a perspective view of an example airborne particulate suppression system as it may be implemented to clean diesel particulate filter (DPF) devices.
- DPF diesel particulate filter
- FIG. 2 is a cutaway side perspective view of an example blast cabinet which may be implemented to clean diesel particulate filter (DPF) devices.
- DPF diesel particulate filter
- FIG. 3 is a front perspective view of an example airborne particulate suppression system.
- FIG. 4 is a close up perspective view of an example airborne particulate suppression system.
- FIG. 5 is a detailed perspective view of an example coil which may be implemented with the example airborne particulate suppression system.
- An example airborne particulate suppression system is disclosed as it may be implemented for cleaning diesel particulate filter (DPF) devices, among other things.
- the example system may be implemented to capture air borne particulates during cleaning of the DPF devices, and keeps those particulates from entering the atmosphere.
- the example system may also be implemented to help keep HEPA filters (of a dust collector used as part of a cleaning operation) cleaner for longer.
- the airborne particulate suppression system includes a containment area having an air inlet to receive air containing soot and an air outlet to exhaust air cleaned of the soot.
- the example airborne particulate suppression system includes a supply basin for a scrubbing agent.
- the example airborne particulate suppression system also includes a coil having a plurality of spray nozzles to spray the scrubbing agent into the containment area.
- the example airborne particulate suppression system also includes a pump. During operation, the pump provides the scrubbing agent to the coil at a pumping rate configured to spray the scrubbing agent from the plurality of spray nozzles and onto the air with soot to clean the air of the soot.
- the scrubbing agent may be recycled and reused as part of a continuous cleaning process.
- An example airborne particulate suppression system includes integrated spray nozzles. These nozzles may be configured to help contain soot and ash released from the DPF devices during cleaning operations.
- An example airborne particulate suppression system may spray a cleaning agent to assist in the capture of airborne particulates from dislodged soot, ash, and any other engine deposits (e.g., oil or fuel contamination), to keep these airborne particulates safely contained and out of the atmosphere during a cleaning process.
- the terms “includes” and “including” mean, but is not limited to, “includes” or “including” and “includes at least” or “including at least.”
- the term “based on” means “based on” and “based at least in part on.”
- FIG. 1 is a perspective view of an example airborne particulate suppression system 10 as it may be implemented to clean diesel particulate filter (DPF) devices.
- the airborne particulate suppression system 10 is shown connected between a blast cabinet 1 and a dust collector 2 .
- the DPF device is cleaned in the blast cabinet 1 .
- FIG. 2 is a cutaway side perspective view of an example blast cabinet 1 which may be implemented to clean diesel particulate filter (DPF) devices.
- DPF diesel particulate filter
- the blast cabinet 1 includes a work area 5 for cleaning a DFP device 6 therein, and a lid 7 that can be opened and closed.
- the lid 7 may include a transparent (e.g., glass or clear plastic) window so that the user can see into the work area 5 .
- Gloves 8 may be provided through openings formed in the blast cabinet 1 for a user to reach into the work area 5 even when the lid 7 is closed to clean the DPF device 6 .
- An air hose 9 is provided so that the user can spray air onto the DPF device 6 to loosen and remove soot and/or other contaminants from the DPF device 6 . This causes the soot and/or other contaminants to become airborne. The air thus has to be contained and cleaned or “scrubbed” before releasing the air to the environment.
- Air containing particulates may be exhausted from the blast cabinet 1 (e.g., via air line 3 ) and into the airborne particulate suppression system 10 .
- the airborne particulate suppression system 10 may be operated to remove some or all of the particulates (e.g., soot) from the air.
- Air that has been cleaned by the airborne particulate suppression system 10 may be discharged from the airborne particulate suppression system 10 (e.g., via air line 4 ).
- the cleaned air is discharged to the dust collector 2 for further cleaning and/or purification.
- the cleaned air may be discharged to the environment.
- FIG. 3 is a front perspective view of an example airborne particulate suppression system 10 .
- FIG. 4 is a close up perspective view of an example airborne particulate suppression system 10 .
- the airborne particulate suppression system 10 includes a containment area 12 .
- the containment area 12 may be the interior space of a cabinet 13 or other substantially airtight housing.
- the cabinet 13 includes an air inlet 14 to receive air containing particulates (e.g., soot from the DPF device) in the containment area 12 .
- a transparent cover e.g., glass or plastic
- the air inlet 14 includes an airflow supply line (e.g., a ducting or other inlet pipe(s)).
- the airflow supply line provides air containing the particular (e.g., airborne soot) into the containment area 12 .
- the airflow supply line is provided through at least a portion of the coil 18 . In FIG. 3 , the airflow supply line is shown extending about half way through the coil 18 may extend lower (e.g., all the way to the bottom of the coil 18 ) or may terminate higher in the containment area 12 (e.g., at or near the top of the coil 18 ).
- the airflow supply line delivers the air containing soot in a downward direction.
- other orientations of the inlet air, the coil, the spray nozzles, etc. may be provided.
- Design considerations related to the orientation of the airflow and counter-current flow of the scrubbing agent may be implemented to enhance efficiency, as will be readily understood by those having ordinary skill in the art after becoming familiar with the teachings herein.
- the cabinet 13 also provides a supply basin 16 for a scrubbing agent.
- the scrubbing agent may be a liquid (e.g., water, detergent, etc.).
- the scrubbing agent may also be a gas (e.g., air or inert gas).
- the scrubbing agent may also be a mixture of liquid and gas.
- the scrubbing agent is provided in a counter-current flow to the incoming air that is to be cleaned or “scrubbed.” In an example, this is accomplished with a coil 18 .
- the coil 18 has at least one, and preferably a plurality of spray nozzles 20 configured to spray the scrubbing agent onto the air containing particulates in the containment area 12 .
- the plurality of spray nozzles 20 are shown in FIGS. 3 and 4 as these may be pointed toward or “aimed” around a central axis of the coil 18 .
- a pump 22 in the supply basin provides the scrubbing agent to the coil 18 at a pumping rate configured to spray the scrubbing agent from the spray nozzles 20 onto the air containing particulates in the containment area 12 to remove at least some of the particulates from the air.
- a manifold 23 may be connected between the pump 22 and the coil 18 to distribute flow of the scrubbing agent at the desired flow rate.
- a pressure gauge 25 may be provided (e.g., connected to the top end of the coil 18 ) to ensure the desired flow rate and/or spray pressure is being maintained during operation.
- the cabinet 13 also provides a collection area.
- the collection area includes a collection bag 26 .
- the collection area may also be configured as a bin or other container for receiving the particulate (e.g., soot) that has been cleaned from the air.
- the collection bag 26 is provided under the coil 18 . Such a configuration enables the collection bag 26 to collect both spent scrubbing agent and particulate that has been removed from the air and/or is now contained in the scrubbing agent after the scrubbing agent is sprayed from the spray nozzles 20 of the coil 18 .
- the collection bag 26 is a screen or mesh to enable the scrubbing agent to pass out of the collection bag 26 , while retaining the particulate (e.g., soot) in the collection bag 26 .
- the collection bag 26 can be removed and emptied and/or replaced with another collection bag 26 (e.g., when it is full of particulate).
- the collection bag 26 is provided in (e.g., hangs inside of) a collection basin 28 for spent scrubbing agent.
- the collection basin receives the spent scrubbing agent. That is, the particulate is retained by the collection bag 26 , and the scrubbing agent passing through the screen or mesh of collection bag 26 is “cleaned” of particulate.
- the scrubbing agent can be recirculated and recycled for reuse.
- a pass-through or opening 30 is formed between the collection basin 28 and the supply basin 16 , enabling the scrubbing agent to return to the supply basin 16 , where the recycled scrubbing agent is pumped via pump 22 into the manifold 23 through the coil 18 and spray nozzles 20 .
- the containment area 12 defines a separate clean zone (e.g., on the left side of the cabinet 13 in FIGS. 3 and 4 ), and a dirty zone (e.g., on the right side of the cabinet 13 in FIGS. 3 and 4 ).
- the clean zone and dirty zone is not limited to left and/or right side of the cabinet 13 (shown by example in FIGS. 3 and 4 ), but instead are defined as distinct and separate zones within the cabinet 13 .
- the clean zone includes the supply basin 16 providing the scrubbing agent.
- the clean zone exhausts the air cleaned of the soot out of an air outlet 24 (e.g., to the dust collector 2 or atmosphere).
- the dirty zone includes the coil 18 , collection basin, and collection bag. The dirty zone receives the air containing the soot for cleaning into the containment area 12 .
- the containment area 12 defines an upper zone and a lower zone.
- the upper zone handles the air exchange (air intake and exhaust) and is where the scrubbing agent is sprayed onto the incoming air.
- the lower zone handles the scrubbing agent, both the supply (e.g., in supply basin 16 ) and particulate collection and scrubbing agent recycling operations.
- the upper zone may be separated from the lower zone by a grated floor (not shown). A grated floor may be provided to collect larger particulates, but is not required. It is noted that the clean zone and dirty zone may extend through both the upper zone and the lower zone.
- FIG. 5 is a detailed perspective view of an example coil which may be implemented with the example airborne particulate suppression system 10 .
- the coil 18 has a plurality of windings formed between a first end (e.g., bottom portion) and a second end (e.g., top portion).
- the coil 18 is positioned in the containment area 12 of the airborne particulate suppression system 10 in a substantially vertical orientation. That is, the first end of the coil 18 is positioned directly above a second end of the coil 18 .
- the first end of the coil 18 may have one or more coil windings that are larger than one or more coil winding on the second end of the coil 18 .
- the coil 18 may have a first end coil diameter W 1 that is larger than a second end coil diameter W 2 .
- the coil 18 may have a first end coil spacing H 1 that is larger than a second end coil spacing H 2 .
- any number of windings may be provided for the coil 18 . More than one coil 18 may be provided.
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Filtering Of Dispersed Particles In Gases (AREA)
Abstract
Description
Claims (20)
Priority Applications (1)
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US17/247,971 US11351496B2 (en) | 2020-01-06 | 2021-01-04 | Airborne particulate suppression system |
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US202062957395P | 2020-01-06 | 2020-01-06 | |
US17/247,971 US11351496B2 (en) | 2020-01-06 | 2021-01-04 | Airborne particulate suppression system |
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US20210205753A1 US20210205753A1 (en) | 2021-07-08 |
US11351496B2 true US11351496B2 (en) | 2022-06-07 |
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US17/247,971 Active US11351496B2 (en) | 2020-01-06 | 2021-01-04 | Airborne particulate suppression system |
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Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1992762A (en) * | 1931-04-02 | 1935-02-26 | Pease Anthony Equipment Co | Method of washing gases |
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- 2021-01-04 US US17/247,971 patent/US11351496B2/en active Active
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1992762A (en) * | 1931-04-02 | 1935-02-26 | Pease Anthony Equipment Co | Method of washing gases |
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